﻿using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using MSXML2; // 添加引用、COM、Microsoft   XML   ,   v2.6、选择、确定。
using System.Text.RegularExpressions;
using System.Net;
using System.Text;
using System.IO;

namespace He.Common
{
/// <summary>
/// 远程文件抓取类
/// </summary>
    public class RemoteHelper
    {

        #region 构造与析构函数
        public RemoteHelper()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        ~RemoteHelper()
        {
            Dispose();
        }
        #endregion

        #region IDisposable 成员

        public void Dispose()
        {
            GC.SuppressFinalize(this);
        }

        #endregion

        #region 日期随机函数
        /**********************************
          * 函数名称:DateRndName
          * 功能说明:日期随机函数
          * 参    数:ra:随机数
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          Random ra = new Random();
          *          string s = o.DateRndName(ra);
          *          Response.Write(s);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 日期随机函数
        /// </summary>
        /// <param name="ra">随机数</param>
        /// <returns></returns>
        public static string DateRndName(Random ra)
        {
            DateTime d = DateTime.Now;
            string s = null, y, m, dd, h, mm, ss;
            y = d.Year.ToString();
            m = d.Month.ToString();
            if (m.Length < 2) m = "0" + m;
            dd = d.Day.ToString();
            if (dd.Length < 2) dd = "0" + dd;
            h = d.Hour.ToString();
            if (h.Length < 2) h = "0" + h;
            mm = d.Minute.ToString();
            if (mm.Length < 2) mm = "0" + mm;
            ss = d.Second.ToString();
            if (ss.Length < 2) ss = "0" + ss;
            s += y + m + dd + h + mm + ss;
            s += ra.Next(100, 999).ToString();
            return s;
        }
        #endregion

        #region 取得文件后缀
        /**********************************
          * 函数名称:GetFileExtends
          * 功能说明:取得文件后缀
          * 参    数:filename:文件名称
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string url = @"http://www.baidu.com/img/logo.gif";
          *          string s = o.GetFileExtends(url);
          *          Response.Write(s);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 取得文件后缀
        /// </summary>
        /// <param name="filename">文件名称</param>
        /// <returns></returns>
        public static string GetFileExtends(string filename)
        {
            string ext = null;
            if (filename.IndexOf('.') > 0)
            {
                string[] fs = filename.Split('.');
                ext = fs[fs.Length - 1];
            }
            return ext;
        }
        #endregion

        #region 获取远程文件源代码
        /**********************************
          * 函数名称:GetRemoteHtmlCode
          * 功能说明:获取远程文件源代码
          * 参    数:Url:远程url
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string url = @"http://www.baidu.com/";
          *          string s = o.GetRemoteHtmlCode(url);
          *          Response.Write(s);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 获取远程文件源代码
        /// </summary>
        /// <param name="url">远程url</param>
        /// <returns></returns>
        public static string GetRemoteHtml(string url, Encoding encoding)
        {
            try
            {
                WebClient client = new WebClient();
                StreamReader reader = new StreamReader(client.OpenRead(url), encoding);
                string html = reader.ReadToEnd();
                reader.Close();
                return html;
            }
            catch (Exception e)
            {
                return e.Message;
            }
        }
        #endregion

        #region 保存远程文件
        /**********************************
          * 函数名称：RemoteSave
          * 功能说明：保存远程文件
          * 参    数：Url:远程url;Path:保存到的路径
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string s = "";
          *          string url = @"http://www.baidu.com/img/logo.gif";
          *          string path =Server.MapPath("Html/");
          *          s = o.RemoteSave(url,path);
          *          Response.Write(s);
          *          o.Dispose();         
          * ******************************/
        #endregion

        #region 替换网页中的换行和引号
        /**********************************
          * 函数名称:ReplaceEnter
          * 功能说明:替换网页中的换行和引号
          * 参    数:HtmlCode:html源代码
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string Url = @"http://www.baidu.com/";
          *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
          *          string s = o.ReplaceEnter(HtmlCode);
          *          Response.Write(s);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 替换网页中的换行和引号
        /// </summary>
        /// <param name="HtmlCode">HTML源代码</param>
        /// <returns></returns>
        public static string ReplaceEnter(string HtmlCode)
        {
            string s = "";
            if (HtmlCode == null || HtmlCode == "")
                s = "";
            else
                s = HtmlCode.Replace("\"", "");
            s = s.Replace("\r\n", "");
            return s;
        }

        #endregion

        #region 执行正则提取出值
        /**********************************
          * 函数名称:GetRegValue
          * 功能说明:执行正则提取出值
          * 参    数:HtmlCode:html源代码
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string Url = @"http://www.baidu.com/";
          *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
          *          string s = o.ReplaceEnter(HtmlCode);
          *          string Reg="<title>.+?</title>";
          *          string GetValue=o.GetRegValue(Reg,HtmlCode)
          *          Response.Write(GetValue);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 执行正则提取出值
        /// </summary>
        /// <param name="RegexString">正则表达式</param>
        /// <param name="RemoteStr">HtmlCode源代码</param>
        /// <returns></returns>
        public static string GetRegValue(string RegexString, string RemoteStr)
        {
            string MatchVale = "";
            Regex r = new Regex(RegexString);
            Match m = r.Match(RemoteStr);
            if (m.Success)
            {
                MatchVale = m.Value;
            }
            return MatchVale;
        }
        #endregion

        #region 替换HTML源代码
        /**********************************
          * 函数名称:RemoveHTML
          * 功能说明:替换HTML源代码
          * 参    数:HtmlCode:html源代码
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string Url = @"http://www.baidu.com/";
          *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
          *          string s = o.ReplaceEnter(HtmlCode);
          *          string Reg="<title>.+?</title>";
          *          string GetValue=o.GetRegValue(Reg,HtmlCode)
          *          Response.Write(GetValue);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 替换HTML源代码
        /// </summary>
        /// <param name="HtmlCode">html源代码</param>
        /// <returns></returns>
        public static string RemoveHTML(string HtmlCode)
        {
            string MatchVale = HtmlCode;
            foreach (Match s in Regex.Matches(HtmlCode, "<.+?>"))
            {
                MatchVale = MatchVale.Replace(s.Value, "");
            }
            return MatchVale;
        }
        /// <summary>
        /// 剥去内容中所以的指定标签
        /// </summary>
        /// <param name="HtmlCode"></param>
        /// <returns></returns>
        public static string RemoveConTarget(string HtmlCode)
        {
            HtmlCode = Regex.Replace(HtmlCode, "<div(.+?)>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "</div>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "<ul(.+?)>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "</ul>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "<li(.+?)>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "</li>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "<table(.+?)>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "</table>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "<tr(.+?)>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "</tr>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "<td(.+?)>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "</td>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "<a(.+?)>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "</a>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "<script(.+?)>", "", RegexOptions.IgnoreCase);
            HtmlCode = Regex.Replace(HtmlCode, "</script>", "", RegexOptions.IgnoreCase);
            return HtmlCode;
        }
        #endregion

        #region 匹配页面的链接
        /**********************************
          * 函数名称:GetHref
          * 功能说明:匹配页面的链接
          * 参    数:HtmlCode:html源代码
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string Url = @"http://www.baidu.com/";
          *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
          *          string s = o.GetHref(HtmlCode);
          *          Response.Write(s);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 获取页面的链接正则
        /// </summary>
        /// <param name="HtmlCode"></param>
        /// <returns></returns>
        public static string GetHref(string HtmlCode)
        {
            string MatchVale = "";
            string Reg = @"(h|H)(r|R)(e|E)(f|F) *= *('|"")?((\w|\\|\/|\.|:|-|_)+)('|""| *|>)?";
            foreach (Match m in Regex.Matches(HtmlCode, Reg))
            {
                MatchVale += (m.Value).ToLower().Replace("href=", "").Replace("'", "").Replace("\"", "").Trim() + "||";
            }
            MatchVale = MatchVale.Trim('|');
            return MatchVale;
        }
        #endregion

        #region 匹配页面的图片地址
        /**********************************
          * 函数名称:GetImgSrc
          * 功能说明:匹配页面的图片地址
          * 参    数:HtmlCode:html源代码;imgHttp:要补充的http.当比如:<img src="bb/x.gif">则要补充http://www.baidu.com/,当包含http信息时,则可以为空
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string Url = @"http://www.baidu.com/";
          *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
          *          string s = o.GetImgSrc(HtmlCode,"http://www.baidu.com/");
          *          Response.Write(s);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 匹配页面的图片地址
        /// </summary>
        /// <param name="HtmlCode"></param>
        /// <param name="imgHttp">要补充的http://路径信息</param>
        /// <returns></returns>
        public static string GetImgSrc(string HtmlCode, string imgHttp)
        {
            string MatchVale = "";
            string Reg = @"<img.+?>";
            foreach (Match m in Regex.Matches(HtmlCode, Reg))
            {
                MatchVale += GetImg((m.Value).ToLower().Trim(), imgHttp) + "||";
            }
            MatchVale = MatchVale.Trim('|');
            return MatchVale;
        }
        /// <summary>
        /// 匹配<img src="" />中的图片路径实际链接
        /// </summary>
        /// <param name="ImgString"><img src="" />字符串</param>
        /// <returns></returns>
        public static string GetImg(string ImgString, string imgHttp)
        {
            string MatchVale = "";
            string Reg = @"src=.+\.(bmp|jpg|gif|png|)";
            foreach (Match m in Regex.Matches(ImgString.ToLower(), Reg))
            {
                MatchVale += (m.Value).ToLower().Trim().Replace("src=", "").Replace("'", "").Replace("\"", "");
            }
            return (imgHttp + MatchVale);
        }

        #endregion

        #region 替换通过正则获取字符串所带的正则首尾匹配字符串
        /**********************************
          * 函数名称:GetHref
          * 功能说明:匹配页面的链接
          * 参    数:HtmlCode:html源代码
          * 调用示例:
          *          GetRemoteObj o = new GetRemoteObj();
          *          string Url = @"http://www.baidu.com/";
          *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
          *          string s = o.RegDropSides(HtmlCode,"<title>","</title>");
          *          Response.Write(s);
          *          o.Dispose();
          * ********************************/
        /// <summary>
        /// 替换通过正则获取字符串所带的正则首尾匹配字符串
        /// </summary>
        /// <param name="RegValue">要替换的值</param>
        /// <param name="regStart">正则匹配的首字符串</param>
        /// <param name="regEnd">正则匹配的尾字符串</param>
        /// <returns></returns>
        public static string RegDropSides(string RegValue, string regStart, string regEnd)
        {
            if (RegValue != "" && RegValue != null)
            {
                if (regStart != "" && regStart != null)
                {
                    RegValue = Regex.Replace(RegValue, regStart, "", RegexOptions.IgnoreCase);
                }
                if (regEnd != "" && regEnd != null)
                {
                    RegValue = Regex.Replace(RegValue, regEnd, "", RegexOptions.IgnoreCase);
                }
            }
            return RegValue;
        }
        /// <summary>
        /// 替换正则所匹配的内容
        /// </summary>
        /// <param name="RegValue">匹配规则</param>
        /// <param name="Replacement">替换为</param>
        /// <param name="htmlString">原始字符串</param>
        /// <returns></returns>
        public static string RegReplace(string RegValue, string Replacement, string htmlString)
        {
            htmlString = Regex.Replace(htmlString, RegValue, "", RegexOptions.IgnoreCase);
            return htmlString;
        }
        #endregion

    }
}